Routen: Bestätigungs-Toast nach Ablaufen + "X× gelaufen · zuletzt" auf der Karte

- record_walk gibt total_km zurück → Toast "🐾 X km gezählt · Lebenswerk Y km".
- Nachtrag-Toast (_flushPendingNavWalk) zeigt ebenfalls km + Lebenswerk.
- list_routes liefert my_walk_count + my_last_walked → Routen-Karte zeigt
  "🐾 X× gelaufen · zuletzt heute/gestern/vor N Tagen".
Macht für Angie sichtbar, dass das Ablaufen einer gespeicherten Route mitzählt.

backend/routes/routen.py

@@ -95,6 +95,7 @@ async def list_routes(
     radius: int             = 10000,
     user = Depends(get_current_user_optional),
 ):
+    _uid = user['id'] if user else -1
     with db() as conn:
         rows = conn.execute("""
             SELECT r.id, r.user_id, r.name, r.beschreibung,
@@ -106,11 +107,13 @@ async def list_routes(
                    json_extract(r.gps_track, '$[0].lat') AS start_lat,
                    json_extract(r.gps_track, '$[0].lon') AS start_lon,
                    json_extract(r.gps_track, '$[#-1].lat') AS end_lat,
-                   json_extract(r.gps_track, '$[#-1].lon') AS end_lon
+                   json_extract(r.gps_track, '$[#-1].lon') AS end_lon,
+                   (SELECT COUNT(*)      FROM route_walks w WHERE w.route_id=r.id AND w.user_id=?) AS my_walk_count,
+                   (SELECT MAX(walked_at) FROM route_walks w WHERE w.route_id=r.id AND w.user_id=?) AS my_last_walked
             FROM routes r
             LEFT JOIN users u ON u.id = r.user_id
             ORDER BY r.created_at DESC
-        """).fetchall()
+        """, (_uid, _uid)).fetchall()
 
     result = []
     for row in rows:
@@ -492,7 +495,13 @@ async def record_walk(route_id: int, body: WalkRecord, user=Depends(get_current_
         )
         update_streak(uid, conn)
         new_badges = check_and_award(uid, conn)
-    return {"ok": True, "new_badges": new_badges}
+        total_km = conn.execute(
+            "SELECT ROUND("
+            "  COALESCE((SELECT SUM(distanz_km) FROM routes WHERE user_id=? AND is_valid=1),0) +"
+            "  COALESCE((SELECT SUM(walked_km)  FROM route_walks WHERE user_id=?),0), 1)",
+            (uid, uid)
+        ).fetchone()[0]
+    return {"ok": True, "new_badges": new_badges, "total_km": total_km}
 
 
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